求教各位大神!!因变量是居民满意度happiness(非常满意,比较满意,一般,不满意,非常不满意),解释变量是空气污染指数aqi和居民家庭人均收入lnaveincome,其他是控制变量。其中空气污染指数aqi 越高,居民越不满意才对,但是得到的系数符号确实正的,是什么原因呢?
ologit happiness aqi lnaveincome gender age nation health educ maritus fair_income worktime area care fare trust class ,nolog
Ordered logistic regression Number of obs = 7,603
LR chi2(15) = 1337.74
Prob > chi2 = 0.0000
Log likelihood = -7743.4698 Pseudo R2 = 0.0795
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happiness | Coef. Std. Err. z P>|z| [95% Conf. Interval]
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aqi | .0040616 .001318 3.08 0.002 .0014784 .0066449
lnaveincome | .1215 .023041 5.27 0.000 .0763405 .1666595
gender | -.1483421 .0476192 -3.12 0.002 -.2416739 -.0550102
age | .0096135 .0018012 5.34 0.000 .0060832 .0131438
nation | .0253142 .0353078 0.72 0.473 -.0438878 .0945162
health | .3970522 .0246436 16.11 0.000 .3487516 .4453528
educ | .0722305 .0321467 2.25 0.025 .0092242 .1352369
maritus | -.3100051 .0612111 -5.06 0.000 -.4299766 -.1900336
fair_income | .4165637 .0438899 9.49 0.000 .3305411 .5025862
worktime | -.002968 .0008986 -3.30 0.001 -.0047291 -.0012068
area | .0002906 .0002528 1.15 0.250 -.0002049 .0007861
care | .2165679 .0833337 2.60 0.009 .0532369 .379899
fare | .1261972 .0179856 7.02 0.000 .090946 .1614484
trust | .2580816 .0255345 10.11 0.000 .2080349 .3081283
class | .2427386 .0158906 15.28 0.000 .2115936 .2738836
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/cut1 | 2.274203 .3249487 1.637315 2.911091
/cut2 | 4.266604 .3130816 3.652975 4.880233
/cut3 | 5.653237 .3147385 5.03636 6.270113
/cut4 | 8.886583 .326646 8.246368 9.526797
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